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Electrical Machines

Electrical Machines
In a dc machine 4 pole lap winding is used. The number of parallel paths are?

 4
 2
 1
 8

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Electrical Machines
The air gap between stator and the rotor of the 3 - φ induction motor is kept

  air gap does not matter.
  as wide as possible.
  as small as possible.
  depends on the material of stator and the rotor.

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Electrical Machines
For P pole machine relation between electrical degrees and mechanical degrees is

 θelec = 2/P*θmech
 θelec = P/2*θmech
 θelec = θmech
 θelec = 4/P*θmech

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Electrical Machines
Rotating part of DC motor is known as

 Pole.
 Carbone brush.
 Starter.
 Armature.

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Electrical Machines
The output power indicated on the name plate of any motor is always the

 Power drawn in KVA.
 Power drawn in KW.
 Gross power.
 Output power at the shaft.

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Electrical Machines
It is an advisable to use auto transformer if the transformation ratio is

 0.5.
 Greater than 1.
 0.25.
 near to 1.

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MORE MCQ ON Electrical Machines

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